GaAs/AlGaAs multiple quantum well self electro-optic effect device
Room temperature spin diffusion in (110) GaAs/AlGaAs quantum wells
... Transient spin grating experiments are used to investigate the electron spin diffusion in intrinsic (110) GaAs/AlGaAs multiple quantum well at room temperature. The measured spin ...
7
Laterally pumped GaAs/AlGaAs quantum wells as sources of broadband terahertz radiation
... quasiparabolic well and a simple square well, and their performance was ...square well system, the emission spectrum of the quasiparabolic well is generally narrower, and up to the moderate ...
7
Tuning of Rashba/Dresselhaus Spin Splittings by Inserting Ultra Thin InAs Layers at Interfaces in Insulating GaAs/AlGaAs Quantum Wells
... in GaAs QWs, which may play an important role in narrow band materials and highly doped QWs as well as at high temperature [22]; (ii) α (or β ) should be the effective Rashba (or Dresselhaus) parameter ...
7
Influence of doping density on electron dynamics in GaAs/AlGaAs quantum cascade lasers
... plasma. The bottom contacts 共Au/ Ge/ Ni/ Au兲 were depos- ited and alloyed, while the top contact 共Cr/ Pt/ Au兲 was not alloyed and evaporated together with a thick Ni layer which served as the etch mask. Devices with 1 mm ...
10
Measurement of the spin temperature of optically cooled nuclei and GaAs hyperfine constants in GaAs/AlGaAs quantum dots
... a self-consistent fully quantum de- scription of the QD electron-nuclear spin system, which is still ...existing quantum models [5, 12, 13, 16] employ significant simplifications ...to ...
8
Characterisation of temperature dependent parameters of multi quantum well (MQW) Ti/Au/n AlGaAs/n GaAs/n AlGaAs Schottky diodes
... (field effect transistors, solar cells, photodetectors, Gunn diodes, microwave diodes, ...field effect transistors (MESFETs) [5, ...(SL’s), quantum wells (QW’s), quantum dots (DQ’s), ...
18
Observation of anomalous linear photogalvanic effect and its dependence on wavelength in undoped InGaAs/AlGaAs multiple quantum well
... photogalvanic effect (ACPGE) current (arising from the reciprocal spin Hall effect) where there is a current swirling over the center of the light spot ...
5
Optical Properties of GaAs Quantum Dots Fabricated by Filling of Self Assembled Nanoholes
... into GaAs QDs. Interestingly, deposition of Ga droplets on GaAs at significantly higher temperatures T = 450–620° results in the formation of deep nanoholes in the substrate ...This effect was first ...
5
Micro photoluminescence of GaAs/AlGaAs triple concentric quantum rings
... semiconductor quantum nanostructures are currently deeply investigated because of their poten- tiality as building block for novel quantum optical and optoelectronic devices ...for quantum ...
5
Self-consistent solutions to the intersubband rate equations in quantum cascade lasers: Analysis of a GaAs/AlxGa1-xAs device
... a GaAs/AlGaAs structure, which is a material more commonly used in com- pound ...operational quantum cas- cade lasers are in the mid-infrared frequency range 8,9 but recently models have been ...
8
Stimulated Emission in AlxGa1-xAs -GaAs Single and Multiple Quantum Well Heterostructure.
... then quantum size effects (QSE) occur ...the well lead to the confined-particle transition. The quantum states of confined carriers can be observed by measuring the optical absorption of the active ...
78
2D Photonic crystal thermo optic switch based on AlGaAs/GaAs epitaxial structure
... The device was characterized using TE polarized light from a tunable laser source over the range from 1460 nm to 1580 ...The device was firstly measured with the heater electrode switched off and light was ...
5
Spin polarization of carriers in InGaAs self assembled quantum rings inserted in GaAs AlGaAs resonant tunneling devices
... low voltages and decreases with increase applied bias. However, no oscillations of CPD were observed with applied bias voltage for RTDs with QDs. The voltage dependence of CPD for InAs QDs was previously associated to ...
22
Electron Microscopy Studies of Non Local Effects' Impact on Cathodoluminescence of Semiconductor Laser Structures
... Spatially and spectrally resolved cathodoluminescence (CL) studies performed in a scanning electron microscope (SEM) or a scanning transmission electron microscope (STEM) are widely applied to determine the luminescence ...
6
Development of AlGaAs /GaAs/ AlGaAs Step Quantum well to produce Tunable Photo Detector and Electro Absorption Modulator for noise reduction
... Asymmetric Quantum well with AlGaAs /GaAs/ AlGaAs ...and Electro-Absorption ...and Electro-Absorption Modulator ...Franz-Keldysh effect and Quantum-confined ...
9
Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under nonresonant ultralow-power optical excitation
... no effect in classical optoelec- tronic semiconductor devices, but becomes an impor- tant factor in nano-scale devices, particularly in semi- conductor quantum dots (QDs) where quantum degrees of ...
10
Optical Gain and Confinement in Gaas/Algaas Structure Quantum Well Lasers
... a quantum well structure, the two dimensional nature of the density of states changes the gain ...a quantum well is constant in the whole ...the effect of injection, the second subband ...
10
MBE grown GaAsBi/GaAs multiple quantum well structures : structural and optical characterization
... the quantum con fi nement energy in each sample was calculated assuming a uniform Bi content throughout the ...effective well widths and Bi contents, which are used to estimate the quantum con fi ...
5
Theoretical analysis of GaAs/AlGaAs quantum dots in quantum wire array for intermediate band solar cell
... A GaAs quantum dot (QD) array embedded in a AlGaAs host material was fabricated using a strain-free approach, through combination of neutral beam etching and atomic hydrogen-assisted molecular beam ...
13
Applications of Quantum Electro-Optic Control and Squeezed Light
... a quantum nondemolition (QND) device, with the feedforward loop providing an additional improvement on the transfer of ...an electro-optic feedforward loop can provide pre- and post- ...
19